I agree, that we need a way to burn some Illuvials, but this will only lead to “hight stat” Illuvials being less rare, and not help the market in the long run.
I think it would be better to lower the cost of fusion, and maybe introduce a mechanism for “burning” Illuvials for XP. (But limit it, so you can raise the level of one Illuvial two times…. One time to level 20 by “burning” one of same type, and one more to raise level from 20 to 40, by “burning” 2 level 20 Illuvials of same type).
Hopefully there will be a new skin system soon, that will help increase demand for skins, which will also help burn more Illuvials.
But we do have to be a bit careful burning too many “low stat” Illuvials. ☺️